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Related Concept Videos

Trihybrid Crosses02:27

Trihybrid Crosses

Trihybrid Crosses
Some of Mendel’s crosses examined three pairs of contrasting characteristics. Such a cross is called a trihybrid cross. A trihybrid cross is a combination of three individual monohybrid crosses. For example, plant height (tall vs. short), seed shape (round vs. wrinkled), and seed color (yellow vs. green).
The F1 generation plants of a trihybrid cross are heterozygous for all three traits and produce eight gametes. Upon self-fertilization, these gametes have an equal chance to...

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Egg Microinjection and Efficient Mating for Genome Editing in the Firebrat Thermobia domestica
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The ECRIS charge state breeding project at TRIUMF.

F Ames1, R Baartman, P Bricault

  • 1TRIUMF, 4004 Wesbrook Mall, Vancouver, BC, Canada.

The Review of Scientific Instruments
|March 5, 2008
PubMed
Summary

Charge state breeding using an electron cyclotron resonance ion source improved radioactive ion production efficiency. Maximum efficiencies reached were 6% for noble gases and 3.5% for alkali ions.

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Area of Science:

  • Nuclear Physics
  • Atomic Physics
  • Accelerator Science

Background:

  • Radioactive ion beams are crucial for nuclear physics research.
  • Increasing the charge state of radioactive ions enhances their acceleration efficiency.
  • The ISAC facility at TRIUMF requires efficient charge breeding for its experiments.

Purpose of the Study:

  • Investigate the performance of an electron cyclotron resonance (ECR) ion source for charge state breeding.
  • Optimize the efficiency of breeding online-produced radioactive ions to higher charge states.
  • Evaluate methods to enhance ion acceptance and beam transport for accelerator injection.

Main Methods:

  • A 14 GHz PHOENIX ECR ion source was set up on a test bench.
  • Singly charged ions from typical online sources were injected into the charge breeder.
  • Ion optics simulations were performed to assess deceleration strategies.
  • A two-gap acceleration system was installed for velocity matching.
  • Charge exchange cross sections with residual gas were determined.

Main Results:

  • Maximum charge breeding efficiencies of approximately 6% for noble gas ions and 3.5% for alkali ions were achieved with single-step deceleration.
  • Ion optics simulations indicated that two-step deceleration could increase acceptance.
  • A two-gap acceleration system was implemented to accommodate varying A/q values.
  • Charge exchange cross sections were quantified for beam transport optimization.

Conclusions:

  • The ECR ion source shows potential for improving radioactive ion beam production at ISAC.
  • Further optimization, particularly with two-step deceleration, may enhance breeding efficiencies.
  • The implemented acceleration system and measured cross sections are vital for efficient beam injection into the accelerator.